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<tr class="t-nv-h2"><td colspan="5"> 核心语言概念</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/same_as.html" title="cpp/concepts/same as"><span class="t-lines"><span>same_as</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/derived_from.html" title="cpp/concepts/derived from"><span class="t-lines"><span>derived_from</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/convertible_to.html" title="cpp/concepts/convertible to"><span class="t-lines"><span>convertible_to</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/common_reference_with.html" title="cpp/concepts/common reference with"><span class="t-lines"><span>common_reference_with</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/common_with.html" title="cpp/concepts/common with"><span class="t-lines"><span>common_with</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5">                                 </td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/integral.html" title="cpp/concepts/integral"><span class="t-lines"><span>integral</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/signed_integral.html" title="cpp/concepts/signed integral"><span class="t-lines"><span>signed_integral</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/unsigned_integral.html" title="cpp/concepts/unsigned integral"><span class="t-lines"><span>unsigned_integral</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/floating_point.html" title="cpp/concepts/floating point"><span class="t-lines"><span>floating_point</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/swappable.html" title="cpp/concepts/swappable"><span class="t-lines"><span>swappable</span><span>swappable_with</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/destructible.html" title="cpp/concepts/destructible"><span class="t-lines"><span>destructible</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/constructible_from.html" title="cpp/concepts/constructible from"><span class="t-lines"><span>constructible_from</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/default_initializable.html" title="cpp/concepts/default initializable"><span class="t-lines"><span>default_initializable</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/move_constructible.html" title="cpp/concepts/move constructible"><span class="t-lines"><span>move_constructible</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/copy_constructible.html" title="cpp/concepts/copy constructible"><span class="t-lines"><span>copy_constructible</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/assignable_from.html" title="cpp/concepts/assignable from"><span class="t-lines"><span>assignable_from</span></span></a></div></div></td></tr>
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<tr class="t-nv-h2"><td colspan="5"> 比较概念</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/boolean.html" title="cpp/concepts/boolean"><span class="t-lines"><span>boolean</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/equality_comparable.html" title="cpp/concepts/equality comparable"><span class="t-lines"><span>equality_comparable</span><span>equality_comparable_with</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/totally_ordered.html" title="cpp/concepts/totally ordered"><span class="t-lines"><span>totally_ordered</span><span>totally_ordered_with</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 对象概念</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/movable.html" title="cpp/concepts/movable"><span class="t-lines"><span>movable</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/copyable.html" title="cpp/concepts/copyable"><span class="t-lines"><span>copyable</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/semiregular.html" title="cpp/concepts/semiregular"><span class="t-lines"><span>semiregular</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/regular.html" title="cpp/concepts/regular"><span class="t-lines"><span>regular</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 可调用概念</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/invocable.html" title="cpp/concepts/invocable"><span class="t-lines"><span>invocable</span><span>regular_invocable</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/predicate.html" title="cpp/concepts/predicate"><span class="t-lines"><span>predicate</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/relation.html" title="cpp/concepts/relation"><span class="t-lines"><span>relation</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/equivalence_relation.html" title="cpp/concepts/equivalence relation"><span class="t-lines"><span>equivalence_relation</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="concepts/strict_weak_order.html" title="cpp/concepts/strict weak order"><span class="t-lines"><span>strict_weak_order</span></span></a></div></div></td></tr>
</table></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<p>概念库提供基础语言概念的定义，它们能用于进行模板实参的编译时校验，以及基于类型属性的函数派发。这些概念在程序中提供等式推理的基础。
</p><p>标准库中的大多数概念一同加上了语法及语义要求。通常，编译器只能检查语法要求。若在使用点语义要求未得到满足，则程序为谬构，不要求诊断。
</p>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;concepts&gt;</code> </div>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于命名空间 <code>std</code></div>
</td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E6.A0.B8.E5.BF.83.E8.AF.AD.E8.A8.80.E6.A6.82.E5.BF.B5"> 核心语言概念 </span></h5>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/same_as.html" title="cpp/concepts/same as"> <span class="t-lines"><span>same_as</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定一个类型与另一类型相同 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/derived_from.html" title="cpp/concepts/derived from"> <span class="t-lines"><span>derived_from</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定一个类型派生自另一类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/convertible_to.html" title="cpp/concepts/convertible to"> <span class="t-lines"><span>convertible_to</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定一个类型能隐式转换成另一类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/common_reference_with.html" title="cpp/concepts/common reference with"> <span class="t-lines"><span>common_reference_with</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定两个类型共有一个公共引用类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/common_with.html" title="cpp/concepts/common with"> <span class="t-lines"><span>common_with</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定两个类型共有一个公共类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/integral.html" title="cpp/concepts/integral"> <span class="t-lines"><span>integral</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定类型为整型类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/signed_integral.html" title="cpp/concepts/signed integral"> <span class="t-lines"><span>signed_integral</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定类型为有符号的整型类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/unsigned_integral.html" title="cpp/concepts/unsigned integral"> <span class="t-lines"><span>unsigned_integral</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定类型为无符号的整型类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/floating_point.html" title="cpp/concepts/floating point"> <span class="t-lines"><span>floating_point</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>   指定类型为浮点类型  <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/assignable_from.html" title="cpp/concepts/assignable from"> <span class="t-lines"><span>assignable_from</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定一个类型能从另一类型赋值 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/swappable.html" title="cpp/concepts/swappable"> <span class="t-lines"><span>swappable</span><span>swappable_with</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定一个类型能进行交换，或两个类型能彼此交换 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/destructible.html" title="cpp/concepts/destructible"> <span class="t-lines"><span>destructible</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定能销毁该类型的对象 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/constructible_from.html" title="cpp/concepts/constructible from"> <span class="t-lines"><span>constructible_from</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定该类型的变量能从一组实参类型进行构造，或绑定到一组实参类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/default_initializable.html" title="cpp/concepts/default initializable"> <span class="t-lines"><span>default_initializable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定能默认构造一个类型的对象 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/move_constructible.html" title="cpp/concepts/move constructible"> <span class="t-lines"><span>move_constructible</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定能移动构造一个类型的对象 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/copy_constructible.html" title="cpp/concepts/copy constructible"> <span class="t-lines"><span>copy_constructible</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定能复制构造和移动构造一个类型的对象 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E6.AF.94.E8.BE.83.E6.A6.82.E5.BF.B5"> 比较概念 </span></h5>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/boolean.html" title="cpp/concepts/boolean"> <span class="t-lines"><span>boolean</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定类型能用于布尔语境 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/equality_comparable.html" title="cpp/concepts/equality comparable"> <span class="t-lines"><span>equality_comparable</span><span>equality_comparable_with</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定运算符 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy1">==</span></span></span> 为等价关系 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/totally_ordered.html" title="cpp/concepts/totally ordered"> <span class="t-lines"><span>totally_ordered</span><span>totally_ordered_with</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定比较运算符在该类型上产生全序 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E5.AF.B9.E8.B1.A1.E6.A6.82.E5.BF.B5"> 对象概念 </span></h5>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/movable.html" title="cpp/concepts/movable"> <span class="t-lines"><span>movable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定能移动及交换一个类型的对象 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/copyable.html" title="cpp/concepts/copyable"> <span class="t-lines"><span>copyable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定能复制、移动及交换一个类型的对象 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/semiregular.html" title="cpp/concepts/semiregular"> <span class="t-lines"><span>semiregular</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定能赋值、移动、交换及默认构造一个类型的对象 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/regular.html" title="cpp/concepts/regular"> <span class="t-lines"><span>regular</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定类型为正则，即它既为 <a href="concepts/semiregular.html" title="cpp/concepts/semiregular"><tt>semiregular</tt></a> 亦为 <a href="concepts/equality_comparable.html" title="cpp/concepts/equality comparable"><tt>equality_comparable</tt></a> <br> <span class="t-mark">(概念)</span> </td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E5.8F.AF.E8.B0.83.E7.94.A8.E6.A6.82.E5.BF.B5"> 可调用概念 </span></h5>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/invocable.html" title="cpp/concepts/invocable"> <span class="t-lines"><span>invocable</span><span>regular_invocable</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定能以给定的一组实参类型调用的可调用类型 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/predicate.html" title="cpp/concepts/predicate"> <span class="t-lines"><span>predicate</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定可调用类型为布尔谓词 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/relation.html" title="cpp/concepts/relation"> <span class="t-lines"><span>relation</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定可调用类型为二元关系 <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/equivalence_relation.html" title="cpp/concepts/equivalence relation"> <span class="t-lines"><span>equivalence_relation</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>   指定 <a href="concepts/relation.html" title="cpp/concepts/relation"><tt>relation</tt></a> 施加等价关系  <br> <span class="t-mark">(概念)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="concepts/strict_weak_order.html" title="cpp/concepts/strict weak order"> <span class="t-lines"><span>strict_weak_order</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  指定一个 <a href="concepts/relation.html" title="cpp/concepts/relation"><tt>relation</tt></a> 所强加的是严格弱序 <br> <span class="t-mark">(概念)</span> </td></tr>
</table>
<p>另外的概念可在<a href="algorithm/ranges.html#.E7.AE.97.E6.B3.95.E6.A6.82.E5.BF.B5.E4.B8.8E.E5.B7.A5.E5.85.B7" title="cpp/algorithm/ranges">算法库</a>与<a href="ranges.html#.E8.8C.83.E5.9B.B4.E6.A6.82.E5.BF.B5" title="cpp/ranges">范围库</a>中找到。
</p>
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